Pull-rod pump jack



. J. H. HOLMGREEN PULL ROD PUMP JACK Filed Sept. 23. 1924- 2 Sheets-Sheet 1 Inuerzfor Juauafllfoznzyreew,

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Oct. 13, 1925- J. H. HOLMGREEN PULL ROD PUMP JACK 2 Sheets-Sheet 2 Filed Sept. 23. 1924 Even/127': J'uZc'zw fili'ozrwreem Patented Oct. 13, 1925.

UNITED STATES JULIUS nnonmonnnn, or sen An'romo, TEXAS.

PULL-ROD PUMP JACK.

Application filed September 23, 1924. Serial No. 739,411.

To all whom it may concern:

Be it known that I, JULIUS H. HOL M GREEN, a citizen of the United States, residing at San Antonio, in the county of Bexar and State of Texas, have invented certain new and useful Improvements in Pull-Rod Pump Jacks, of which the following is a specification.

- My said invention relates to pull rod'pump jacks as are used in connection with oil wells, and it is an object of the same to provide simple and relatively inexpensive mechanism for giving a straight line movement to the," pump rod, the mechanism'being'sueh as will' not be likelyto get out of order and cause delay in operations.

Referring to the accompanying drawings which are made a art hereof and on which similar reference c aracters indicate similar parts- Figure l is a side elevation of my device,

Figure 2, an elevation looking toward" the right in Figure 1,

Figure 3, an enlarged detail of the pulley and its mounting shown in Figure 1,

Figure 4, a plan of parts shown in Figure 3,

Figure '5, a plan of a yoke shown in Figure 1,

Figure 6, a vertical section on line 6-6 in Figure 5,

Figure 7, a detail of the block for attaching the cable to the pump rodviewed from the front as in Figure 2,

Figure 8, a side view of said block and parts connected thereto; and

Figure 9 a detail of a yoke-saddle shown in Figure 1.

In the drawings reference character 10 indicates the base of the frame which may be supported on beams 11 or in any other conventional or desirable manner. The base constitutes one member of a frame including upright posts 12 and 13 arranged in pairs at the front and rear ends of the frame respectively. The posts are connected at their upper ends b crom bars and preferably this part of the rame comprises two 1nwardlydirected channel bars 14. as indicated in Figure 2. Each of the front posts may also consist of a pair of channel bars resting at their lower ends on channel bars 15 forming parts of the base 10. For further re-inforoing the frame cross bars 16 and 17 are provided extending obliquely from corner to corner of the frame, these cross bars being of structural iron. The front and rear pairs of posts 12 are also connected by braces 18 as shown in Figure 2.

A vertical beam 19 is mounted on a pivot 20 extending crosswise of the frame and sup ported on a bearing 21 secured to members 15 of the base. The beam 19 may consist of an I-beam or any other convenient form and as-. here"show1f; is. provided with blocks 22 filling the space between the flanges of the I-beam and bearing against the adjacent bars 14 or against other guides fastened to such bars or fixed to the frame in some other desirable manner. At the upper end of the beam a yoke block 23 is secured to the flanges of the beam by bolts or rivets 23. Another yoke block 24 is bolted to the beam between ends and the beam is provided as indicated at 24: with a series of holes whereby the yoke blockmay be adjusted lengthwise of the frame to vary the stroke of the pump reg for a given length of stroke of the pull ro A yoke 25 engages the yoke-block 24 at one end and at the other end receives a hook on the pull rod 26. A yoke 27 engages the yoke block 23, this yoke being shown detail in Figures 5 and 6 and comprising an opening indicated at 28 loosely embracing the beam 19 and an arcuate front part having an arcuate groove at 29 to receive a cable 30. The rear end of the yoke is curved at 31 to provide a rocking engagement with the groove in the yoke block.

7 The cable 30 comprises two parallel portions connected at their ends to a pump rod 31, and forming a bight lying in the groove 29. The parallel parts of the cable pass over a pulley 32 and lie respectively in grooves 33 and 34, said pulley also having a groove 35in which the pump rod may rest as it moves up and down past the pulley 32.

The pulley 32 projects normally from the upper front corner of the frame and said pulley is mounted for rotation on a shaft 36 to which it is preferably fixed. The shaft is journaled in bearings 37 having oil cavities at their upper ends closed by covers 38.

of the wa The bearings are slidably mounted on channel bars 14 and channel bars 39 secured parallel thereto but facing outwardly, the upper flanges of the adjacent pairs of channel bars 14 and 39 forming tracks for the bearing boxes.

Gusset plates 40 are located between the channel bars 14 and 39 and the pairs of oppositely facing channel bars forming the respective posts 12, 12 said gusset bars having upward extensions 41 and rearward extensions 42 (Figures 1 and 3). Channel bar 43 are secured to opposite sides of the upward extension 41 and reach fol-ward bc- -be placed in a well or removed therefrom or when tools of various kinds are to be put in or taken out of the well by means of a block and tackle or other similar means. For normally holding the bearings and the pulley in the position shown in solid lines in Figure 3 I have provided keys 46 with inclined rear edges hearing at one end on fillers 47 between the angle irons 43 and at the other end againstan edge of a hole cut in the gusset 40, the front edges of the keys resting against boxes 37.

For attaching the cable 30 to the ump rod 31 I have provided a pair of bloc s 48 embracing the pump rod by means of grooves on their inner faces and fastened together by bolts 49. The cables are joined at the ends to form eyes 50 embracing blocks 51 at opposite sides of the respective blocks.

,In the o eration of my device the pull rod is actuate as usual and the yoke block 24 havin been set in accordance with the desired length of stroke of the pump rod the beam 19 will oscillate in a vertical plane at right angles to the shaft 36 causing the pulley to rotate and moving the pump rod up and down in a vertical line as will be obvious from consideration of Figure 1 of the drawings. Extreme positions of the beam 19 are indicated in dotted lines in Figure 1 but it will be understood that these positions will vary according to the stroke of the pull rod and the position of the yoke block 24. The only movable parts of the pump jack are the beam 19, the parts directly connected thereto, and the pulley 32.

It will be obvious to those skilled in the art that my device may be modified in various ways without departing from the spirit of the invention and therefore I do not standing eam pivoted at its lower end on the base, a fixed frame on the base providing lateral guides for the beam, a yoke on the beam for attachment of a pull-rod, a cable connected to the upper end of the beam, and a pulley on the frame over which said cable passes to the pump-rod, substantially as set forth.

2. In a pull-rod pump-jack, a base, a

fixed frame thereon, an upstanding beam I pivoted at its lower end on the base, a yoke on the beam for attachment of a pull-rod, a cable connected to the upper end of the beam, a pulley on the frame over which said cable passes to the pump-rod, and means adjacent to the upper end of the frame to guide the beam in its oscillatory movement, substantially as set forth.

3. In a pull-rod pump-jack, a base, :a fixed frame thereon, an upstanding beam pivoted at its lower end on the base, a yoke on the beam for attachment of a pull-rod, a cable connected to the upper end of the beam, a pulley on the frame over which said cable passes to the pump-rod, and supporting means for said pulley mounted for adjustment toward and from the path of the pumprod to provide space for 'ving access to the well with block and tace or the like, substantially as set forth. 1

4. In a pull-rod pump-jack, a base, a fixed frame thereon, an upstanding beam pivoted at its lower end on the base, a yoke on the beam for attachment of a pull-rod, a cable connected to the upper end of the beam,.a pulley on the frame over which said cable passes to the pump-rod, bearings on the frame, registering slots in said frame above and below said bearings, and keys fitting in said slots, substantially as set forth.

5. In a pull-rod pump-jack, a base, a fixed frame thereon, an upstanding beam pivoted at its lower end on the base, a yoke on the beam for attachment of a pull-rod, a cable connected to the upper end of the beam, a pulley on the frame over which said cable passes to the the shaft of the pulley slidable forward and backward on the frame, registering slots in pump-rod, bearings for said frame above and below the bearings,,

and keys fitting in said slots the rear faces bracing the upper end of the beam said having spaced grooves to receive the limbs of the cable between the pump-rod and the beam saisd pulley having a third groove between said first-named grooves for the pump-rod, substantially as set forth.

8. In a pump-jack, a fixed frame, a cable for attachment to the pump-rod, a pulley over which the cable passes, and bearings for, the pulley slidably mounted on the frame sald bearings normally projecting forward from the frame and adapted to be moved backward to facilitate access to the well, substantially asset forth.

9. In a pump-jack, a fixed frame, a cable for attachment to the pump-rod, a pulley over which the cable passes, bearings for the pulley slidably mounted on the frame said bearings normally projecting forward from the frame and adapted to be moved backward to facilitate access to the well, and means for guiding the bearings including a gusset-plate extending downward therefrom between parts of the fixed frame, substantially as set forth.

10. In a pull-rod pump-jack, a base, a fixed frame thereon, an upstanding beam pivoted at its lower end on the base, a yoke block at the front side of the beam, a yoke supported on the yoke block for attachment of a pull-rod at the rear side of the beam, a cable connected to the upper end of the beam, a pulley on the frame over which said cable passes to the pump-rod, and means for securing the pull-rod yoke to the beam at various points along the length of the beam, substantially as set forth.

11. In a pull-rod pump-jack, a vertical beam pivoted at its lower end, means for attachment of a pull-rod including a yokesaddle adjustable along the beam for Varying the stroke of the pump-rod relatively to the stroke of the pull-rod, and means for connecting-the upper end of the beam to the pump-rod for moving the same in a straight line including a pulley on the fixed frame and a flexible connection passing over it, substantially as set forth.

In witness whereof I have hereunto set my hand and seal at Washington, District of Columbia, this 22nd day of September, A. D. nineteen hundred and twenty-four.

JULIUS H. HOLMGREEN. [n s.] 

